Road stud



FIG. 1 is a front view of a road stud showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a plan view thereof;

FIG. 4 is an underneath view thereof; and

FIG. 5 is a perspective view thereof from above and one side. 

The ornamental design for a road stud, as shown and described. 